CVE-2026-21047

HIGHPre-NVD 8.38.3—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 67% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
8.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.3Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Out-of-bounds write in ImsService prior to SMR Jul-2026 Release 1 allows remote attackers to potentially execute arbitrary code.

CVSS v3
8.3
EG Score
8.3(medium)
EG Risk
53(Track)
EG Risk 53/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity83% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
33%
KEV
Not listed

Published

July 28, 2026

Last Modified

July 30, 2026

Advisory Details (1)

Auto-updated Jul 28, 2026
No patch confirmed yet.
generic

Samsung Mobile Security

https://security.samsungmobile.com/securityUpdate.smsb?year=2026&month=07

Vendor Advisories for CVE-2026-21047(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 21× in last 7d / 113× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 134 total refreshes for this CVE.

  1. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-29 23:35 UTCEG score recompute
  3. 2026-08-29 23:35 UTCGHSA enrichment
  4. 2026-08-28 21:41 UTCEPSS rescore
  5. 2026-08-27 20:57 UTCEG score recompute
  6. 2026-08-27 20:57 UTCGHSA enrichment
  7. 2026-08-27 14:25 UTCEPSS rescore
  8. 2026-08-27 09:38 UTCGHSA enrichment
  9. 2026-08-26 19:41 UTCEG score recompute
  10. 2026-08-26 19:41 UTCGHSA enrichment
  11. 2026-08-26 14:46 UTCEPSS rescore
  12. 2026-08-26 05:31 UTCGHSA enrichment
  13. 2026-08-25 18:15 UTCEG score recompute
  14. 2026-08-25 18:14 UTCGHSA enrichment
  15. 2026-08-25 13:48 UTCEPSS rescore
  16. 2026-08-25 07:09 UTCGHSA enrichment
  17. 2026-08-24 20:13 UTCEG score recompute
  18. 2026-08-24 20:13 UTCGHSA enrichment
  19. 2026-08-24 09:15 UTCGHSA enrichment
  20. 2026-08-23 22:19 UTCGHSA enrichment
  21. 2026-08-23 11:23 UTCGHSA enrichment
  22. 2026-08-23 00:28 UTCEG score recompute
  23. 2026-08-23 00:28 UTCGHSA enrichment
  24. 2026-08-23 00:19 UTCEPSS rescore
  25. 2026-08-22 13:31 UTCGHSA enrichment
Show 75 more
  1. 2026-08-22 02:30 UTCEG score recompute
  2. 2026-08-22 02:30 UTCGHSA enrichment
  3. 2026-08-21 23:49 UTCEPSS rescore
  4. 2026-08-21 15:34 UTCGHSA enrichment
  5. 2026-08-21 04:39 UTCEG score recompute
  6. 2026-08-21 04:39 UTCGHSA enrichment
  7. 2026-08-20 22:55 UTCEPSS rescore
  8. 2026-08-20 17:39 UTCGHSA enrichment
  9. 2026-08-20 06:43 UTCGHSA enrichment
  10. 2026-08-19 19:47 UTCEG score recompute
  11. 2026-08-19 19:47 UTCGHSA enrichment
  12. 2026-08-19 17:03 UTCEPSS rescore
  13. 2026-08-19 07:17 UTCGHSA enrichment
  14. 2026-08-18 20:21 UTCEG score recompute
  15. 2026-08-18 20:21 UTCGHSA enrichment
  16. 2026-08-18 13:48 UTCEPSS rescore
  17. 2026-08-18 09:14 UTCGHSA enrichment
  18. 2026-08-17 22:16 UTCEG score recompute
  19. 2026-08-17 22:16 UTCGHSA enrichment
  20. 2026-08-17 13:47 UTCEPSS rescore
  21. 2026-08-17 11:20 UTCGHSA enrichment
  22. 2026-08-17 00:25 UTCEG score recompute
  23. 2026-08-17 00:25 UTCGHSA enrichment
  24. 2026-08-16 14:56 UTCEPSS rescore
  25. 2026-08-16 13:29 UTCGHSA enrichment
  26. 2026-08-16 02:33 UTCEG score recompute
  27. 2026-08-16 02:33 UTCGHSA enrichment
  28. 2026-08-16 02:14 UTCEPSS rescore
  29. 2026-08-15 15:38 UTCGHSA enrichment
  30. 2026-08-15 04:42 UTCEG score recompute
  31. 2026-08-15 04:42 UTCGHSA enrichment
  32. 2026-08-15 01:30 UTCEPSS rescore
  33. 2026-08-14 17:46 UTCGHSA enrichment
  34. 2026-08-14 06:47 UTCEG score recompute
  35. 2026-08-14 06:47 UTCGHSA enrichment
  36. 2026-08-13 22:00 UTCEPSS rescore
  37. 2026-08-13 19:51 UTCGHSA enrichment
  38. 2026-08-13 08:55 UTCGHSA enrichment
  39. 2026-08-12 22:00 UTCEG score recompute
  40. 2026-08-12 22:00 UTCGHSA enrichment
  41. 2026-08-12 13:50 UTCEPSS rescore
  42. 2026-08-12 11:05 UTCGHSA enrichment
  43. 2026-08-12 00:09 UTCEG score recompute
  44. 2026-08-12 00:09 UTCGHSA enrichment
  45. 2026-08-11 13:42 UTCEPSS rescore
  46. 2026-08-11 13:13 UTCGHSA enrichment
  47. 2026-08-11 02:17 UTCEG score recompute
  48. 2026-08-11 02:17 UTCGHSA enrichment
  49. 2026-08-11 00:00 UTCEPSS rescore
  50. 2026-08-10 15:22 UTCGHSA enrichment
  51. 2026-08-10 04:27 UTCGHSA enrichment
  52. 2026-08-09 17:31 UTCEG score recompute
  53. 2026-08-09 17:31 UTCGHSA enrichment
  54. 2026-08-09 13:46 UTCEPSS rescore
  55. 2026-08-09 06:36 UTCGHSA enrichment
  56. 2026-08-08 19:41 UTCEG score recompute
  57. 2026-08-08 19:41 UTCGHSA enrichment
  58. 2026-08-08 16:37 UTCEPSS rescore
  59. 2026-08-08 08:45 UTCGHSA enrichment
  60. 2026-08-07 21:50 UTCEG score recompute
  61. 2026-08-07 21:50 UTCGHSA enrichment
  62. 2026-08-07 10:54 UTCGHSA enrichment
  63. 2026-08-06 23:58 UTCEG score recompute
  64. 2026-08-06 23:58 UTCGHSA enrichment
  65. 2026-08-06 13:46 UTCEPSS rescore
  66. 2026-08-06 13:03 UTCGHSA enrichment
  67. 2026-08-06 02:07 UTCEG score recompute
  68. 2026-08-06 02:07 UTCGHSA enrichment
  69. 2026-08-05 19:17 UTCEPSS rescore
  70. 2026-08-05 15:11 UTCGHSA enrichment
  71. 2026-08-05 04:15 UTCGHSA enrichment
  72. 2026-08-04 17:16 UTCEG score recompute
  73. 2026-08-04 17:16 UTCGHSA enrichment
  74. 2026-08-04 15:10 UTCEPSS rescore
  75. 2026-08-04 10:38 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-21047?
CVE-2026-21047 is a high vulnerability published on July 28, 2026. Out-of-bounds write in ImsService prior to SMR Jul-2026 Release 1 allows remote attackers to potentially execute arbitrary code.
When was CVE-2026-21047 disclosed?
CVE-2026-21047 was first published in the National Vulnerability Database on July 28, 2026, with the most recent update on July 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-21047 actively exploited?
CVE-2026-21047 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 67.4% of all scored CVEs.
What is the CVSS score of CVE-2026-21047?
CVE-2026-21047 has a CVSS v3 base score of 8.3 (NVD).
How do I remediate CVE-2026-21047?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-21047, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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